<https://celebritydentist.com/bad-smell-around-crown-best-suitable-treatment-option/#webpage>
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"Bad smell or Halitosis usually can originate from an ill fitting dental crown, or a root canal that has gone bad, First depending on the infection, the root canal needs to be redone"
<https://celebritydentist.com/bad-smell-around-crown-best-suitable-treatment-option/>